#include <entt/core/attribute.h>
#include <entt/entity/registry.hpp>
#include "../common/types.h"

namespace shared {



ENTT_API void update_position(entt::registry &registry) {
  registry.view<position, velocity>().each([](auto &pos, auto &vel) {
    pos.x += static_cast<int>(16 * vel.dx);
    pos.y += static_cast<int>(16 * vel.dy);
  });
}

ENTT_API void emplace_velocity(entt::registry &registry) {
  // forces the creation of the pool for the velocity component
  static_cast<void>(registry.storage<velocity>());

  for (auto entity : registry.view<position>()) {
    registry.emplace<velocity>(entity, 1., 1.);
  }
}
}